Wayne ESP25 Upgraded 12-Volt Battery Backup System, Black The Wayne ESP25 upgraded battery back up system protects your basement when the power is out. Assembled in the us, the epoxy coated steel and cast iron construction is built to last, while moving up to 2900 gph at 0 feet of head. Battery box dimensions: 9"H X 13"W X 7"L. Corrosion-resistant thermoplastic battery box protects battery and charging controls Features Always Have a Plan - This 12 Volt WAYNE basement battery backup sump pump is perfect to keep your basement dry during heavy water flow when you lose electricity. Whether it?s rain, snow melting, etc. WAYNE model ESP25n can keep your basement dry. Back-Up Ready - ESP25N will pump up to 2,700 GPH and remove/evacuate/expel/get rid of up to 10,000 gallons on a single battery backup charge. WAYNE WSB1275 75 AH Battery is required for back-up but not included. Efficient Design - Fits in 14? diameter or larger sump basins, with no need to drill a weep hole Additional Features - Epoxy-coated steel housing with a cast-iron base. Corrosion-resistant thermoplastic impeller for maximum water flow. Protective battery case includes LED display and an audible alarm to let you know if there?s a problem. Quality You Deserve - Proudly assembled in the USA for quality you can trust. Warrantied for 2 years for dependable, efficient, ultra-quiet performance. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.